Mama - Second Short Story for Class

So, I have to write a story by April first and read three others by March 28th. Ugh. So much for Spring Break. I've been thinking of writing a story backwards,m basically a good part of the ending is where we start, then it goes to what lead to the ending, and then the part where the story began and we know, mostly, how it will end. Then we see the very ending. If we knew the ending, would we do it anyway? Once I'm done with the first draft, I'll put it up. Thanks to those who help and post comments. They are very helpful.